| Campaign of Ferdinand I | |||||||
|---|---|---|---|---|---|---|---|
| Part of the Ottoman-Habsburg wars | |||||||
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| Belligerents | |||||||
| Habsburg Austria Holy Roman Empire Spain Bohemia Kingdom of Croatia (Habsburg) Papal States Hungary (Kingdom of Ferdinand's) Voivodian Serbs |
Ottoman Turks Moldavia Hungary (Kingdom of Szapolyai's) |
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| Commanders and leaders | |||||||
| Ferdinand I, Holy Roman Emperor Charles V, Holy Roman Emperor Jovan Nenad † |
John Zapolya Petru Rareş voievod of Moldavia Suleiman the Magnificent |
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| Strength | |||||||
| 60,000 | 30,000 | ||||||
| Casualties and losses | |||||||
| unknown | unknown | ||||||
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Following the Battle of Mohacs, the Ottomans were forced to withdraw as events elsewhere in their now massive Empire required the Sultan's attention.[1] Seizing upon their absence was Ferdinand I who attempted to enforce his claim as King of Hungary. In 1527 he drove back the Ottoman vassal John Zapolya and captured Buda (now Budapest), Győr, Komárno, Esztergom and Székesfehérvár by 1528. Meanwhile, the Ottoman Sultan took no action at this stage despite the pleas of his vassal.
For the Austrians, the victory here would be a very disappointing one. On 10 May 1529, Suleiman the Magnificent launched his own counter-attack negating all of Ferdinand's gains. Of greater disappointment was the fact that many of the recently captured forts surrendered without resistance greatly speeding up the advance. As a result, Suleiman was able to reach and besiege Vienna.